Pulsator for milking-machines.



I; H. scHIEY- A c. F-.-| IMBAIL.

PULsAToR Foa MIIKINIG MACHINES. APPLICATION FILED MAY 22. 1909. 1,182,215 Patented May 9,1915' 2 SHEETS-SHEET l..

I T, ////////A/.

.5 g FIGA.

c/s o`3 m 1.31' 1' C/s l vat a II I1 y? W3 TIG/ WI'TNEissI A INVENTQRS I F. H. SCHLEY L c. F. KlMBALL.

PULSATOR FOR MILKING MACHINES.

APPLICATION FILED 'MAY 22. 1909.

Patented May 9, 1916.

2 SHEETS-SHEET 2 FICTIS.

INYENTor-s A57 M l WITNESS MU UNITE onirica.

y `:FRANK n. scHLEY' AND CLEMENT F. K nviBALL, oncoUNcIL BLUFFS, IOWA.

n invention relates to improvements in pulsators for useqinconnection with suction whereby the suction t be pulsated operates the apparatus for producing the pulsation without other' connections, lmachinery or notorpower.` And the objects of our invention areilirst, toprovide simple and effyapparatus; third, to provide such an ap `iaratus which maybe easily taken apart 'ind cleaned; fourth, to provide such an apparatus of` the' fewest y possible parts i" "ng" the same easy to., separate,` clean y replaee ;iifth, to provide a pulsator milking apparatus `such as can be ap- )jlied between the receiving milk can and can, thus, giving more positive release of he suction inthe teat cups; sixth, to prolesuch a pulsator which will alternately pply suction and release to oneor two of the teats at a time so astoimitate as nearly spossihle the pull of milking by hand; event h,`to provide a means in such a pulitoijlfor changing andregulating the speed r `rate(otpulsations forone or more aniialsl] We attainthese objectslby the apparatus illustrated in rayving's y in which;

Q;ure l. Fig. 4, Fig-7, Fig. 9 and Fig;

ersevertieal crosssection on the line 242 inl Fig. l; Fig. is a longitudinal cross sectloinot.the'plungeryshown in Fig. l with a "dilied form of yvalve andshowing also sottholieads of the pulsa-tor cylin- ,"5 and. @rarer transverse 'vertical u ons on thelinesf-fan'd 6-6 re- "t1velyotFig- 4; .Figl 'is a cross section y Wing a portion o fa modified form of ructure illustrated inlFig. 7 Fig. vl() o ,vertical cross Asection .on the line 12-l2 'specification oftetters Patent.

cover of milk can; Fig. l5 shows the nay)` be .used in connection with milking vided.

he teat cupspr to the cover of the milk y' vlength with a suction the accompanying tion supply pipe.

kthe pipes for `longitudinal sectional views of vari-` forms of the pulsator: Fig. 2 is a trans `a .transverseNei-tical cross section on the I 1e 10TH) infFigLQrFig. 121s a transl1 gj Fig;T "13` isT a planview cfa porf PULSTOR FOR MILKING-MACHINES..

Patented May 9, 1916.

Application ined nay 22, 1909.A serial No. 497,818.

ltiono the structure disclosed in Fig. 11;;

Fig. le shows the pulsator applied to the pu1 sator applied between the teat cups and milk can; and Fig. 1G `is 'thecross section ofthe relierI valve which may be used with our apparatus.

Similar `letters refer to' similar and like `parts throughout theseveral views.

For a variety' of purposes including the suction usually employed in milking machines, it is desirable to produce an internnttent action of such' suctionfand to provide a partial or complete release of` the suc- -tion at suitable'intervals. To accomplish v this, have less means independent of the frequently been employed complicated apparatus has been pro- In 'our invention the power of the suction employed for other purposes is utilized to operate the pulsator. In all forms of the apparatus a cylinder is adapted -to re suction itself 'ceive a piston or plunger and provided with a removable head at each end thereof except the forms of Figs. 9 and 11 in which only one head is removable. The piston orplunger is arranged to cut ol `the transmission of suction through the cylinder a valve for a pulsator, and may he of any suitable form, for convenience it will be re fer-red to throughout the specification as the plunger. A" detailed description will be applied to Figs. 11 and 12, the modifications in the other forms being` separately distinguished. In said Figs. 11 and 12 the cy1 inder cis provided near the center of its connection s for a suc- The cylinder c also has pipes as fm, and 'm' to which suction desired to be pulsated at points eeuidistant from the connection s, longitudinally of the cvlinder` there being` ports opening directly into the cylinder from each of the connections s, lmI and m. It is not necessary that more than one such connection as m be used Where only one or more are atta ched ger p. `Suitable atmospheric release .ports and more or and While it is i a single pulsated suction is desi red but more 'maybe applledand for better-illustration nicate with vthe connections m and m respectively at the endsv of the stroke of the head /r-,or to be swung to oneside to release the headl -The innercnd of the larger. portion ot' the plunger is always subject to lthe full suction fromy the supply port. The

ceives the valve 'v1 which is arranged to slide Athrough the `saine and consists of two circular heads joined by a reduced stern provided with central radial guiding wings,

justed by the screwsv or Valves o* and o tor the purpose of regulating the flow of air therethrough and hence' the rate of reciprocation ot' the valve.

5 plunger by means' 01"' suitable annular ports said stem projecting beyond the heads at 70 or grooves 71, h in the plunger 72. The cylin- -each end of the valve and the vvalve o1 is der in this forni of the invention has its constructed so .that in any position of the bore divided into two parts, one of slightlyk plungery)1 with reference t0 the Valve 111 greater diameter than the other, the two beone of the cha bersof the cylinder c1 at ing separated by a shoulder located at the the ends of thetvl lunger p1 "must be openand 75 point of entrance ofthe suction supply port. through tlicfp'assage 'w1 Ywhich the valve The plunger ,n has two portions of differing r1 operates and the radial port g1 commudian'reters toY lit thertwo parts of the cylin- 'nication-is established through the groove g der, the larger portion being of less length with the suction supply and when the valve thanuthrfl corresponding portion of the cylis at either eXtreme of its travel the pro- 80 inder 'which portion is closed at its outer liecting ends of its stein will yclose one or the end by the head c. Said-head is removably. other of the inner enlarged portions of the held in'. place by a bail .j hinged into the restricted atmospheric ports Zt or l" which sides or' the cylinder c, and adapted to be are provided in the'respective heads of the sprung into notches in the outer side of the cylinder and openings of` which can be ad- 85 In Fig. 3 the valve r1 is shown as con- 90 structcd to seat on-ca'ch end ot 'the plunger p1 hut when seated at one end is open at the other.

ln Figs. 4,' 7, and 9 the plunger-s p2, p3,

plunger' /r is moved inthe cylinder 'c by f lvarying the pressure in the space at the outcrcnd ot' the` larger portion of the plun-vr ger. Said space is `always in' communication with the groove g through the restricted 3o passage ai in the plunger, while in the head /c'a large atmospheric relief port t is pro'- Lvided, under control ofthe outwardly opening 'valve/1i. Said valve-is provided with a guide stem ol. less diameter, fitting m a bore and; /respectively areI shown as having` two 95 concentric sizes. one larger than the other so that, as in Fig. l1`r the movement of the plunger p in the cylinder c provides three chambers, the area ot' the plunger in each t' in onel end ot' the plunger y, and may he )chamber heingditferent from the area ot the I100 actuated outwardly hy a spiral spring 'a' plunger -p in at1 least one of the other seated in ay reduced extension ot' said bore chambers. and engaging` la reihuzed extension -onthc In Figs. 4, 5, and (i 'the construction is guide stem. though as will be lshown in dc-l shown to he exactly sii-nilar to that in Fig.

40fscribing thcoperation ot the pulsatorthe l except that the plunger p2 is. formed in 105 spring may bc omitted it' desired. The outtwo concentric diameters and the valve ward movement of valve r is limited by the screws o and 01 are omitted from the air `hail j. when thc device. is in operative condi ports yat the ends of the cylinder, and a tion. A lport n is provided between the bore singleiscrew of`I thesame kind is provided z'- and the atmospheric relietl port 71. in the to regulate an atmospheric port which en` 110 outer surface of the plunger. lThe integral ters the annular space lett hy the movement head closing thc end ot the smaller bore ofA of the plungerin the inner end of the enthc cylinder' is provided with an atmoslarged portion of. the cylindeiz* plieric port Z which can he more or less re- In Fig. 7 the valve 'U3 is shown having the 'stricted hyvthc adjusting screy'v or valve o, part c3. Jformed upon it which `is arr: nged 115 hy which means, as well as by regulating' ,to 'move ina bore 'islin a central elongated the, suction supply, the. frcque cy of the suc-V .portion of' the vhead at the smaller end of tion pulsations may he regulated.` A port the cylinder c* a, small 'transverse atmose 7" may hc provided in the cylinder c bepheri'c'port 3L being provided near'the outer tween the smaller chainher fand the annu Aend 'of the bore i3. At Aits other endthe 120 lar groove or port Lso that any leakage of valve 'asis formed the same as ylone end ot siwtionthrough the hora of the plunger the valve in Fig.` The headvatthe. large y), the port u and aiinula r groove or port 71. lcndofthe cylinder is provided with a short or around thc plunger y: `will not 'he comlnuclosed bore to form an ralr cushion for the .60 nicaicd to the elrarulasr r/ and interfere with projecting end of the va.lve`stem',and asinall 125 or lessen the' resistance and affect the freatmospheric port leads into said bore near `quencv of the lpulsations thus regulated.I its inner end. This' forni is also provided v 'In Fig. l the plunger w1 is of one diame- -witlran intermediate air port Z3 and screw iter only and has an avial circular bore 'wl 03 as in Fig. l to regulate the speed of moveeslcxtending through it. 'lhe said bore rement of the plunger. In Fig.' 8 the saine 'its AH fronry ot its lni'ger end l tothe i inderliead pon the'onter end of the v ilve "SteinV Cured n' hollenv` sleere in guidedA I inu the enlergedfenter' end of vthe bore in the lstenrpr y y 'leevenndi vzilre outwardly. i Anenlrrmenientof `the innemend ofi the bore `I `inthe linder head forms `zt `passage com- 1 port 4F, `said .'pnssa'g'e being closedibyV the Yilyeheed when iXi/its norinnl outu'n'rd po- SitonifT iehsinnller'` endfofthe eylinderis fjjroiide with ani atmospheric porti4 and j'alye sereiv o4 similar` to, thosein Fig.y 1'1.

' `lix'ith thensual suetionfpipees `andheving pulsating pipes and em Vleadingtothe tetfeupsfrf, m" orns igfprefernble the cylinder fr) ofthefpulsntor may be connected to itofr beingbrought nearer to theteat cups Shounlin llitgtls."k `Another connection "niny lieusedin the snniemnnner so that )ne` cnn njmif `lie lise/(l 'for Inore thun one nniliill .Y ii s ii ynlye yur nsrsliown d `lfmnyheelnploye AThe relief s Arranged tolle ezlnineeted with the `heiised is shown in Fig. 15. `The inwardly `lie un"ifs-'pressed ton sent hy the prlngiagthe A.tension of `u'hleh nmy he rog- )my :he plnrfwfl` lietueen tlietezit cups nud )u sitter or 'un here nrthe system Where 1t letormlure the i'neuuin orsuetion l pres ui :suit `the `wrulitions orhninnil Eto vhe rnilked. l .l llierri Lito Fig. l' the suction `of the nil' la tozvon enjd of y poi-1f,` l". l 1'( he rylindor el (losing the -'illuxgpliingferf/r is :it .this `time more foin tlr f end 'of the `(-yliiulenf:I to l tl`1e"\"z1l,i'e is thrmrn. The plunger rented hy the sudtion`r nt the onfl of the eylnl rto` u'iliioli the iinlvo "vf is thrown `nnove int rnd `of the oyl`iiuliuf`fl until; the plun- /f fissefsfovor und rovers oneend of' the opening the 'othen end or purtinlly no" the sune Ahy ronson oi' `tllewnlvo ho- 4 in1 the plungerV/f The suetionthen throus therulro 'nl tojtheopposite nd the cylinder' opening the port Z and flaptedto Close this portis a` 1 ng the ntmosphere throughv a Q'llhe'ipulszitor haring theeylinder c Inny ffoimnpart of l the cnn cover es shown 1n Fig.' i

piilsnt-or iincl` toutcufpsi'ndlvtleentrait the promotions .2',I Such .relense valve may` untefl"liyfthe nut iff/4'. Such reliervnlre` oiwfhnnge or regulate `the suine to [will hy rensonoithe llessenedpressure.

elosing the port Zt. This produces a .greffl'A ger pllijin` the Same mennen is forced to the, Vopposite end of its travel y1n the cyllnder c1,

l 1 "ii-lessiireionfthe end oftheiplung'erg.

7211 forn'iwhenee the` valve v1 came then on'lts The rate of` travel of the plunger in either direction may be regulated byadjusting the correspomling screw o` or o` .infFig Sgthe` yalveyvl is shown with the heads of-the "rallye seatingl upon the bore w1.

*'llhe only difi'erenee in the operation `oit' the mlve ffl ns shown 1n Fig. 3 nndltheoper,

tionfoi'lthe v nlve U1 in Fig. 1 is that, 1e re-` spective heads of the vulve el seat on the`-` whereas, in Fig. l theyalveoP passes into the boring w1 and in both enses f the operation of theynlve results in redneing `the suction and increasing the utmospherle pressure in one end of the cylinder.

In; Fig; lthe valve o1 operates to change theatmospheric pressure in one end` of the eyliiuleuduring the whole yn iovement ofthe plunger p1, While in Fig. 3 the valve/v1 permitsl n leakage of air into the cylinder if the vulve n" is carried nwny from either head of the cylinder und during the renininder of the movement of the plunger.

lndfigclosing or opening oi.` the port lby theserew o2 or` by :'iny suitable means willregulnte the compression and suction of the nir in the intermediate nnnulnrehnmher to properly retard the movement of the i plunger 792. i i

`For convenience of eXpression-the/Sllction in the connections m und m nre culled pulw sute lsi`uftions und in the .'eonneetionfs` the suction .r. In ull `forms ns in Fig. ll'when: the plunger y) moves in one direction the suetion s is communicated through` the grlfomf'e rr/ to `the pulsnteil suction m, the

other pulsnted suction m heilig closed.` As the pulsntell suetion m isopened the releuse port 'r' is ninde to fzornuulnicnte with the connertimi m releasingr ull suction through m. tion is eouununionted to the connection mf, the pulsnted suotion m is released.` by

of the (communication o'l the port r with' the ronnertion m.' In vthis nimmer alternntoslu-tions inny beprodluzed rby the Inovenientoli n single pulsatingrnlre ns theplun- ,grr y. l llt is `obvious thnt, only one of the pulsnteil suotlons fm, muy he used but prefernhly we plane the pulsutor nenr the tenteups` nd in the saune nmnner when the sucmeans l und. use the alternate pulsating' su'otionswl upon ent-h o'l the tufo sets of tents.l .This s1li tornate movement of the plunger 7) to ef- `tert tho results `stntud'rnny he also nacomplislu-l hv usingr n, single ended vulve o 0f l;

iorni us shown in Fig. 7. i

When the plunger yr* is in theposition'- shown in Fig. 7 the vulve N'eloses the opening ol' the port in through the plungerpi' into the chamber of the enlarged portion of 1 cylinder c3 and the air through the -port 3t the plunger p3 has reached the limit ofI its travel farthest from the port 3*. As'soon as the valve o3 lbecomes unseated from the port w3 through the plunger p3 the pressure f of the air through the port 3V and the sucv tion in the cylinder 03 Will throw the valve 'v3 .to its extreme travel toward the port 3t closing the latter. By reason of the larger I l area oi one end of the plunger p3 than the other, the suction will throw the plunger p3 f K back tor'the position shown in Fig. 7 when the operation Will be constantly repeated. Any desired speed may be attained by limiting the suction and compression through theport Z3 by any suitable means as the screw 03.

If a spring n3 is employed, as shown in Fig. 8, in place of the plunger portiona3 of the valve e3 and the chamber 3, the valve o is moved with the plunger 03 until the tension of the spring n3 exceeds the suction of the valve @3 on itsseat in the port w3 through the plunger p3 when it Will fly back to the position shown in Fig. 7 'closing the port 3l. The plunger 713 will then follow'7 the valve 023 back toward that end of the cylinder c3 until the-port 'w3 'through the plunger p3 is again' closed by the valve o3."

In. a similar manner, as shown in Fig. 9, the valve o* maybe arranged to close the )ort w* and a s rin(Y a arranged Without the' cylinder oi to close the port lli.' lVlhen the plunger p4 is. in the position shown in Fig. 9 the valve e? Will close the port 104 and vthe plunger 7J* will then by reason of the decreased suction on the larger end of the plunger p4 While the intermediate shoulder between the larger and smaller portions of the plunger Which here forms one side of the groove g is under full suction be moved toward `the opposite end of the cylinder o* drawing with it the valve @t against the spring a4 and allowing free accesspf air through the port 4t. The spring n* Will then be compressed until it overcomes the suction through the port w? von the valve '04, or until the nut 4 is stopped in the limit of its travel, say when the valve u4 is in position shown at 4". be released from the port w* and be returned to the other end of its travel closing lthe port 4t. By reason of the suction through the port wf' and the unequal area of one Then the valve '0 4 Will vat the-end of its travel most remote from the port t and just as it closes the release port r, the pressure of air from Without the cylinder' 0 through the port u and the bore or chamber z' upon the valve fu is reduced and the suction through the port w causes a reduction of the pressure at the larger end of the cylinder and operates to move the valve o in to close `the port t. The plunger p by reason of the suction in the chamber having the larger piston area will then move toward the port t. |The pressure of the air upon the plunger portion a of the valve v through the 4.port

7", port il. andthe chamber ,will then'tend to move thev valve 'v outward to openwthel Vport t but by reason of the area of the uvill press the valve v ofi' its seat on the port if, whereupon the valve vis released from its seat covering the port t.

`When the valve o is released from its seat `covering lthe port t it Will only partiallyrelieve the suction through the port w yin the chamber between the plunger p and the head-of 'thepylinder 7c. The valve fn will tendto be seated by la force equal to the dilerence of the atmospheric pressure and the pressure`'rin -the chamber, 'exerted upon the area ofthe cross section of the valve o Where it passes through the port t. Thetendency of the valve v to be thrown to 'the' position 'u' off from `its seat will be equal rto the force exerted by the difference of the atmospheric pressure through the ports r', u and the chamber i and the pressure in the chamber at the left of. the plunger upon the varea-of the cross section of the portion Aa of the valve v Since the area of the portion a of the lvalve o is greater thanthe area of the cross section of the valve o Where it passes through: the port t the force tending to move the valve off from its seat and to the position-fa is greater than thev tendency to seat the valve and the valve u will, therefore, be moved to the' position 11 after ithas left l o thatthejop ninghetween the s reatjer than thespace ed fwhere it *i passes this result is' ob# AVlien l arranged oif sufficient size;` to l equalize pressure en y thareasvof the'plunger p, tsenlarged ait tgl th t will befre ngeryp kvill more tontlie `oraiosite end `o t tiavelylu'lienth operation Just described liereueated* ringe, B

igSQlLandilQ is not 'at all y ,-"it'frequently happens in yappaiaitus that irt and grit red it 'e antilla morepositire means than desired i to overcome ithe dangers n caused` thereby. For this puruith the port "alor entirely with` junt'iltlie `c"oniinession of the tomes `the.pressure ot"v the air l ff thV 's `lringfnlto' open the tv as otliefposition thejofflrti'oiifa .ofthey valve e' i1' froinlieinglthroivn by th'e spring n ifi iVlThen the valve a as heretofore i de,-

ipo te` endlofpthe e "la ien' the spring v ienientgofltliefplunger 'p until the nl'tlirougliltlie port-ieidraws the vvalve ifcofif rli'e` moi l pressing tliejspringvngjivlien the operadescribedA ivi i y he repeated.

Vlinder c from the lo plunger 7) dropped i and "the parts thorrnd` easily placeil in the cylinder. placed"inposition with the/valve it and thel i hail lnfought in the tnnivol` j a` uctionpul `torn@cylinder. `a pulfv kl'ilungcr thereinandan` axially dissu'liclentdi ance; this distaneeis" ne gli` the port t. The

the port tfisaopened the port fw andthe ressure nearucedand the lt` will he observed that fthe Aoperatienjof this device as witliftlie increment ofvalves like 'die pringgninayheemployed in they o actuponjtlie valve 'e either in tlie'rplunger "p "moves to the f its;ftravel"` toward the portj t' the 1S collleiSGd` ;if the i'alve covers Iren lutjlien the valve fu moved? 1 Or if the bail f ort i? `and ythe` suction i upon the in rijtlnougli' thewfportfw preventsfthe the J port` t.' etheplungei" 71 will jedgas" before toward the `port t, l

cleanvithe apparatus illnstratedin Fig."

)ailVjfisfspl'ungvoutgofthe slot in the the cylinder cito the lposit-ion l is droppedfloutgand the head l.:

`plunger 7 may be anddtho `pulsator` is ready y posed reciproeating 'valve adapted v,to admit air to one or more chambers of said cylinder `to alternately decrease the intensity of the Suction on saidlplunger to operate it.

l `In asuction pulsator a cylinder having-` l a suctionA supply Aconnection and pulsatedL suctiony connections and release ports, a

plunger withlgrooves therein and adaptedto alternately connect and disconnect said pulsated suction'connections with said supply 75 connections and said pulsated suction con-y l ncctions'ivitli said uieleasejports, and an lia-Xially disposed reciprocating valve adapted to admit air to one or more chanil'ieijs of the saidcylinder to alternately decreasetlie in?n `tensity y `f the suction on saidplunger tO-QP- erate it. l l l l i l f ,l l A 3. The combination of `a cylinderI having `headsWitliialport in one or both of said l heads, apulsator plunger in said cylinderl and a valueadapted tovvary the supply of" airinto the said cylinder through said port in" one or more of said cylinder heads', `said valve operated by the combined action of the plunger and` suction upon said valve. 4. In a suction pulsatoiga cylinder having `concentric unequal bores, a supply suction connectiom pulsated suction connections and release portsga plunger having grooves and" adapted `to alternately connect and disconf nect said supply suction connection With isaid pulsated suction connections and said release vports lwith. said y pulsated suction conf nections,` `an axiallyiplaced reciprocating valve adapted to open and close "a port in 100 lo'neliead `of said cylinder to alternately decrease the intensity of tliesucvtion lupon said plunger', said valve being operated'bythe` combined `action of said plunger andvsuction' i upon sai valve and a spring adapted toy accentuate the movement of said valve rela# tive to the movement ofthe said plungerto operate the said valve.` *l* i i 5; In a suction pulsator a cylinder having l concentric unequal bores; a pulsator plunger ytherein and an axially disposed reciprocatet ing vvalve adapted to admitair to on'e or more chainlicrs ot said cylinder to alternati-ly decrease the intensity of the suction on .said plunger t`ifoperate it, `and a means 11E xoi pneinnatically retarding the` movement olB said plunger. y n i l. In a suction pulsatora cylinderliaving concentric unequal hoi-es. a pulsator p vilungei therein and anaxially disposed rcciprocat- 1.20 l lng valve 'adapted to admit lili'` to one chain-` her of the said cylinder `to alternately de i crease the. lintensity ot' the suction on said plunger toopei'ate it and a means of pneu matically retarding' the inovcnicnt"offthe` 1h25` plunger.` l

7." Theconilunation of a cylinder, a

, sator plunger tlierein,`a rcrriovable-cylinder i head haring-` a iport tl icrein"and` a -Valve adapted to: open andclose said port, and a 130 bail for engaging said head to hold itto the cylinder.

8. The combination vof a cylinder, apulsator plunger therein, a removable cylinder. .head having a port therein, a valve passing through said port in said cylinder head and adapted to open and close said port, said valve operated by `the combined action of said plunger and suction upon said valve and abail forengagiiig said head to hold it xtolthe'l cylinder and limiting the travel of said valve'in one direction.

H 9. The combination of a. cylinder having a supply suction connection,pulsated suction connections, and release ports,l a pulsator plunger therein, a valve chamber in said plunger, .a removable cylinder lie-ad having f a port therein, a valve passing through Said port andl adapted to close it and extending' intoy said valve'cliainber in vsaidplunger, said `plunger being provided with ports adaptedto connect said valve chamberv in said pliingerwith a. release port in said cylinder p, and al bail for engaging said removable head to hold it to the cylinder and limiting the travel of said valve in one direction. v

`10. The combination o'l a cylinder habving a supply suction connection, pulsated sucy ."'tion connections and'i'elease ports, a pul-y sator plunger therein, having ports .adapted j to alternately connect and disconnectsaid supply suction' with said pulsated 'suction connectionsand said pulsatorjsuction connections with said release ports and said plunger having a valve chamber therein and r.ports adapted to connect said valve cham-- `beravith saidrelease port and a restricted portconnecting one 'chamber of, said cylfinder 'with another, a removable cylinder head having a port therein, a :valve ,passing through said port and adapted to'close it and extending 'into said valve .chamber in said plunger and a bail for engaging said 'removable head 'to' lhold it to the cylinder and limiting the travel of said valve in' one.

direction.

il. The combination of a cylinder having supply suction connection, pulsated suction .connections and release ports, a puleater plunger vtherein having ports adapted toalternately connect and disconnect said supply suction with said. pulcated suction l connections and said pulsator suction connec- 'tion with said release ports and said plunger lhaving a valve chamber therein andv ports Aadapted to connect said valve chamber With said vrelease port and a restricted port con-r necting one chamber of said cylinder` with l another, .a -.i"einovable cylinder head having a port tlicrcima valve passing vf port and adapted to close it and 'exilending throuwli said .Y into said valve chamber in said plunger, a

-1,1caa15 spring-interposed in said valve chamber be- .tween said plunger and said valve and abail for engaging said removable head to hold it to thecylinder and limiting the travel of said -valve in one direction.

12. The combination of a cylinder having ay supply suction connection,pulsated suction connections and releaseports, apulsator plunger thereinv havingports adapted to alternately connect and disconnect said supply suction With .said pulsated suction connections and said ulsator suction connections with said re ease ports and Said plunger having avalvechamber therein and ports adapted to connect said valve chain- -her with said release port and a restricted port connecting one Ichamber of said vcylinder With` another, a removable cylinder 'head having a port therein, a valve passing through said portand adapted to close it and extendinginto said. valve chamber in` said plunger, a spring interposed in said valve chamber between the said plunger and Said valve and a bail for engaging said re movable headr to hold it to the cylinder and limiting Vthe travel of said valve in one di `rection and a means for ypneui'naticzilly retarding the frequency of the movement ot' said pulsator plunger in said cylinder.

13.L The combination of; a cylinder having a suction supply andr pulsator suction connections and headsy with a port in one or both of same, a pulsator plunger therein, an axially placed reciprocating valve adapted p connecting with said pulsated suction connections and a receiving milk can interposed in ysaid suction supply.

14. The combination of; a cylinderhaving'a suction supply connection and pulsated suction connections, a pulsator plunger thereico in, a valve adapted to' alternately vary the l intensity .ot tlie'suction upon said pulsator plunger to operate it; said valve .being operated by succesively changing the` application of the suction by the movement oi? said plunger, teat cups'on one or more of said rpulsated .suction connections, a receiving milk can interposed in said suction supplyy and a relief valve'interposed. in s'aid suction vsupply between the said receiving milk can and said cylinder. f FRANK l-l. SGHLEY. .l f CLEM. F. KMBALL. lVitnesses: o

P. O. ALLiisiioU'su, HENRY PETERSON.

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